SCIENTIFIC NAME: Hydrangea macrophylla 'PIIHM-I' PP20,176

COMMON NAME: Endless Summer Twist-n-Shout® Bigleaf Hydrangea

GARDEN SIZE: 3 to 5 feet tall by 3 to 5 feet wide

GROWTH RATE: Moderate

USDA ZONE: 4 to 9

EXPOSURE: Dappled sunlight to partial shade; protect from harsh afternoon sun here in Tennessee.

WATER & SOIL: Prefers moist, well-drained soils rich in organic matter; tolerates clay, loam, or sand. Performs best in acidic to neutral pH but tolerates mildly alkaline conditions. Blooms change color with the pH; in general, blue in acidic soils or pink in alkaline. Requires consistent moisture, especially in full or dappled sun.

HABIT (FORM): Upright, rounded, freely branching

FOLIAGE: Deciduous; dark green leaves with red stems

FLOWER COLOR: Pink to blue depending on soil pH

FRAGRANCE: None

BLOOM FORM: Lacecap

BLOOM TIME: Early summer through fall; reblooms on old and new wood

PLANT ORIGIN: Japan, China, Korea, and Southeast Asia

WILDLIFE SUPPORT: WILDLIFE SUPPORT: May provide some nesting sites and shelter for birds and small mammals, but does not serve as much of a host for local insects and wildlife. May provide food for insects in the spring.

FERTILIZING: Apply organic compost or a balanced slow-release fertilizer in early spring; avoid late-summer feeding to prevent damage to tender growth before frost.

PRUNING: Blooms primarily on old wood; prune immediately after flowering.

TOXICITY FLAGS: Mildly toxic if ingested (contains cyanogenic glycosides)

USES: Beds, borders, hedges, cottage or woodland gardens; accent plant for shade gardens